Trenching machine.



H. L. GEVEKE.

TRENCHING MACHINE.

APPLICATION lFILED IAN.`3I. |918. 9

1,301,833; f Patented m1291919.

UNITED smresrezrrnr omen.

HENDRIK, LODEWLJK. GEVEKE; QE HILWERSUM.NmmELANDSmASQIQNQR 12o l LQQZJBYENNQOESQHABGEVEKE ,ooms TECHNLSCE BUREAU, 0E NSE-T11- EBLANDS, `A COMPANY oF, NEUH-,EBLAND TBENQHING Mannino;

specification of Letters latenfc.y

Application tiled January 31, 191B. Serial N g. 214,644,

ance Withsaid system, as is generally. known intheart',. wralflel trenohesor furrofwshaw ing` a -Widtl of -about- -eentinieters andi a depth Lof. about. .-35 :centimeters are made in Ithe'iprovigo-1i sly plowed. ground. l-Ifhese trenehes.- are .spaoed apart r4about .75 centimeters. The-excavated soilf-.is-.-thrown-1ipf into@ dams alongs'idei the t1enohes,-and is.y

gradually spreadvoventhe-.roots of the plants as the' Iattergrownp. In the` oiden days such trenches: were -dnglby hand throughout; in recent years, however,l efforts- .have A:beenv exer'eised 'to .'.provide' a suitable-.machine for the';said purpose andthe scarcity of agricultural; laborers, VWho eouldearn higher wages in other-.branehesyfgavea strong stimulus to* mak-.1nL .such endeavors.

the previously plosive-,olifI ground Y. andto. throw the:ee'i'waztel.:soil@upv into damsaalengside the furrows.. f I Withfthesennaehinesmhe detachedthat it is not in thexmostoiasorablje condition from?. .ontY :agricultural: eine @if view, .unless the olods are redwoodrblr'yfhariohwhich..how@l eveninyoivesaa gireaial'los's lorrtimemnd; money oeredhy ailaye'ofeorthrhamn' .-.theheght and the'1 :Width e of. .thentmuoh 120.1: ;m.de1.- i The machine aCcordingf-to'- the :presentin'.-

Ventioniisf proyidedwifth'enelittin Y too1.ha:v ing. a;ase,otion::corresponding :to :t at of: the

beingflowea'edethe required edepthg. isam'noviedt .'fliief..e-'njployme.nty of serewshapedf boring 'I tools -iorfelevatingfcearth@ "onrnud .is not broaiilflymow; l

Ehefmachine according? tof .the present invention has the' following eharaet'eristiof fea-- tures i A cutting tool, having;inseetienthefshapeof the trench tor bei eut, partly lineloses a seremsheped looming tooli vwlffxi'o .1 rotatable about i its: axis; 4said. bo-ring too is mounted atthefrear of a earriage or -theliltein anim ohned position .with its -freel end pointing forward 7 The free end of the screw-shaped boring tool .extends .-beyon'df. 'the cutting 15001; by Whieh: it is inoiosed;

bottom edge of-'the cutting 'lin'- closing theboringtool' is' reoeSS'Bi-l; "Eher-slide Walls of the eutting to o1ir inoios'-v lng--thofborilg tool are'provided with disk charge openings, behind Whieh tunfgegiL shaped# inenibels'..farei provided.A l

"Ehe"4 arrangementedeseribedf aboveihashtlhe' foililo'wilrg advantagems'featiures By bheaeoeetionof aeatting'soolhav-ingie; seotio-nalishaipefoorresp'oniingfto-lthat:of the* trench-.to beeuowith aborngf tool revolving 1nA same, a-.treneh-"o' desired sectioneair be made imonesingleoperation Wit lowwwen eonsmnpton 5f @sought `:the:eriorilgeioent..otlieboring tool 1n. am inclined posioir-att'he rear; @h

provided in the side Walls of the cutting tool; the tuni'iel-sliaped members provided behind these openings mold the elevated soil into continuous dams; the earth, being brought in a finely divided condition by the boring tool, is utilized for being gradually spread around the foot of the plants put in the ground.

Figure 1 isa side elevation of the trenching machine;

Fig. 2 is a side elevation of the trenching device proper-on an enlarged scale g Fig. 3 is an end view of the trenching machineon an enlarged scale.

At the rear end of a motor driven carriage l two trenching devices 2 are mounted in an inclined position With their free ends pointing forward. In the example given the carriage is a soscalled tractor, (caterpillar), which has special advantages for the present purpose.

Each of the trenching devices 2 comprises a cutting' tool 3 having the shape of a rectangular tube. Said tube determines the sectional shape of the trench to be made; instead' of, rectangular same may be trapezi- -form in section or have any other suitable shape.

The cutting tool ,3 incloses the screwshapedboring tool 4 Whose shaft carriesy a bevel gear 5 at its top. A bevelv gear meshing ,Withthe` gear -5 isdriven througha suitable transmission gear by the motor of the tractor, so that rotary movement may be imparted to the boring tool Al. The top of the trenching device 2 is-rotatably mounted on a shaft 6 carried in a frame 7. The bottom end of said device is suspended by means of chains or cables 8 from guide pulleys attached near the top of the frame. When traveling on roads the trenching device is hoisted so that. ,its bottom edge'is at some distance above the road' level. If the machine is'to be put` inbperation the. trenehing device-is loweredvvitlifits fre/eend the requireddepth :below: the.` ground level.

f ',I`hesci3eWrSl1Pcd-boring tool 4. projects i some distancebeldw tliebottom edge of -the i cutting ibOOl.' 3;-, i This arrangement allows the soilbelovv thebottom level of the trench tobe loosenedythrough adristanee A. The

soilbetween-the; bottom edge of the cuttin elevated in thef tubeeshaped top part of lthe` l,the sbilzdischarged alongside the trenches into continuous dams.

Assuming nowthat the trenching machine is to' be put inoperation on a sugar cane field and that it coml'nences to Work in a corner of the field.

As the boring tools looking from the rear side of the machine have an anti-clockwise rotary movement, the tunnels l() and l1 will mold the soil into continuous dams at the left hand side of the trenches. When the machine has reached the end of the field it is turned in order that it may travel in the opposite direction. In order that the soil during this reverse travel of the machine may be discharged at the same side of the trenches, the left hand side openings in the Walls of the cutting tools 3, in front of the tunnels 10 and 1l, are shut oif by means of slides (not shown) guided in grooves 13 and supported in their closed position on projections 14. Owing to the fact that the direction of rot-ation of the boring tools remains unchanged, the elevated soil is again thrown up against the left hand side Walls of the cutting tools 3, but as the discharge openings in these Walls are closed, it vvill be discharged through the openings in the right hand side Walls and formed into continuous dams by the tunnel-shaped moldingmembers 11 and l2. The boring tools need not necessarily be operated,simultaneously; in some cases the trenching devices may be driven alternately, so that the right hand sidedevice is in operation during the travel of the machine in one direction, the left hand side device during the travel in the reverse direction.

The bottom edge of the cutting tool 3 is provided with 'a strengthening strip 15 in order that it may stand the heavy strain to which it is exposed.

The bottom edge of the rear Wall of the cutting tool 3 is recessed in order that the bottom of the trench may receive a curved form for the purpose-stated.

It is obvious that the above embodiment of the invention may. .be varied in many ref spects Without departing from the scope and the spirit ofl the inventionx 1 WhatI .claim asi-my invention and desire'. to secure b'y Letters Paten-t is l. In a trenching machine, the lcombination of a cutting-tool having in section the? shape of the trench tobe' made with a screw-shaped ,boringftool which is rotatable aboutitsy axis and substantially inclosed by the said cutting-tool. f

2. Ina trenching-machine, the combination of a carriage, 'With a trenching'device comprising in combination a cutting-tool having in section the sha e of .the trench to be made 4and a screws apediboring-.tool which vis rotatable about its aXis and substan tially inclosed by the said cutting-tool, t-he tion of a carriage, a cutting-tool having in section the shape of the trench to be made,

n and a screw-shaped boring-tool which is rotatable about its aXis and substantially in- `closed by the said cutting-tool so as to prowhich isrotatable about its axis and substann `tion of a carriage, with a trenching-deviee comprislng a cuttlng-tool having in section tiallyinclosed by the said cutting-tool.`

5. In a trenehing-machine, the combinathe shape of the trench to be made and a 1 `screw-shaped boring-tool which is` rotatable i n 0 about its axis and substantially inclosed by the said cutting-tool, the `said trenching device being pivotally connected with the rear end of the carriage in an inclined position with its free endpointingforward.

6. In a trenching-Inachine,` the combination of a carriage, `a cutting-tool havingin section `theshape of thetrench to be inade,

1 and a screw-shaped boring-toolwhich is rotatable about its axis and substantially inclosed by thesaid cuttingftool, a side Wall `of the cutting-tool having an opening through which the soil elevated may be discharged. `In a "trenching-machine, `the combination of a carriage, a cutting-toolhaving in i Copies ,of this patent may be obtained for ve cents each, by addressing the commi `Washington,ILIJ.

` section the shape of the trenchto bemade,`

and a screw-shaped borin -tool which is `ro `tatable about its axis an substantially `inclosed by the said cutting-tool, a side-Wall of the cutting-tool having an opening through which the soilgelevated may be discharge and adapted to be closed by a slide. y

8. In a trenching-machine,` the combina` tion of a carriage, a cutting-tool having in y section theshape of thetrench to "be made, and a screw-shaped boring-tool which is rotatableabout its axis and substantially in- 46` `Closed `by `um Said `Cutting i001, ,both Sidey Walls of the cutting-tool having an opening through which thesoil elevated `may be dis `charged and adapted tobe closed by slides.`

9. In a trenching-machindthe combinaf tion of a carriage, a cutting-tool having in section the shape of the trench to be made` and having a side Wall provided with an opening for discharging the soil elevated,` a

screw-shaped boring-tool. which is rotatable about its axis and substantiallyinclosed by the said cutting-tool With a tunnel-shaped n member secured tot-he carriage behind the said openingand adaptedto mold `the 'dis`` charged soil into acontinuous dann;` a

In testimony fwhereof Ihave aiixed my signature in presence of tvvo witnesses.

1 HENDRIKLODEWIJK GEVEKE,

Witnesses;` i i WV. HENDRIoKs,"`

ssioner 1of Patenti, y

iso`

DnBAER.:` 

